[Xfce-i18n] Translatable strings missed in www-xfce-org.po

[Chipong Luo]

Hi, everyone

1. No strings below in the current www-xfce-org.po that should be
translatable:

* "Set an image in a Thunar folder as wallpaper" in
http://www.xfce.org/about/tour46

* "Xfce website", "Thunar website" and "Written by Benedikt Meurer, 21
Jan 2007" in http://www.xfce.org/about/tour44

* "Subscribe to articles using RSS Feed" and "Download:" in
http://www.xfce.org/about/news

* "Warning, not all changelog versions were printed!" in
http://www.xfce.org/download/changelogs

* "Xfconf" in http://www.xfce.org/projects

* Entire http://goodies.xfce.org/

* Entire http://docs.xfce.org/

* Entire http://wiki.xfce.org/

2. One person should be in a line in http://www.xfce.org/about/credits

3. Core Components should exclude xfce-utils in
http://www.xfce.org/about/releasemodel